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Project Blue Book Special Report No. 14: Analysis of Reports of Unidentified Aerial Objects

United States Air Force, Air Technical Intelligence Center · 1955-05-05 · 309 pages · text from the file's own layer

Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.

Open the PDF at page 107 Original source ↗

“Harder”1 page

  • p. 76 …Apparently these are harder to identify. (3) Shape In this case, there is a higher percentage…
INDEX OF TABLES
(Continued)
Page
Table A83. Evaluation of All Sightings by Duration of Sighting, 1948 154
Table A84. Evaluation of All Sightings by Duration of Sighting, 1949 154
Table A85. Evaluation of All Sightings by Duration of Sighting, 1950 155
Table A86. Evaluation of All Sightings by Duration of Sighting, 1951 ' 155
Table A87. Evaluation of All Sightings by Duration of Sighting, 1952 156
Table A88. Evaluation of Unit Sightings by Duration of Sighting, All Years 157;
Table A89. Evaluation of Unit Sightings by Duration of Sighting, 1947 157
Table A90. Evaluation of Unit Sightings by Duration of Sighting, 1948 158
Table A91. Evaluation of Unit Sightings by Duration of Sighting, 1949 158
Table A92. Evaluation of Unit Sightings by Duration of Sighting, 1950 159
Table A93. Evaluation of Unit Sightings by Duration of Sighting, 1951 . 159
Table A94. Evaluation of Unit Sightings by Duration of Sighting, 1952 160
Table A95. Evaluation of Object Sightings by Duration of Sighting, All Years 161
Table A96. Evaluation of Object Sightings by Duration of Sighting, 1947 161
Table A97. Evaluation of Object Sightings by Duration of Sighting, 1948 . 162
Table A98. Evaluation of Object Sightings by Duration of Sighting, 1949 . 162
Table A99. Evaluation of Object Sightings by Duration of Sighting, 1950 163
Table A100. Evaluation of Object Sightings by Duration of Sightings, 1 9 5 1 . 163
Table A101. Evaluation of Object Sightings by Duration of Sighting, 1952 : . . . . . 164
Table A102. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Five Seconds or Less 165
Table A103. Evaluation of All Sightings for All Years/by Duration of Sighting for Months
of Year, Six to Ten Seconds 166
Table A104. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Eleven to Thirty Seconds 167
Table A105. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Thirty One to Sixty Seconds 168
Table A106. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Sixty One Seconds to Five Minutes 169
Table A107. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Six to Thirty Minutes 170
Table A108. Evaluation of All Sightings for All Years by Duration of Sighting for Months ' ' •
of Year, Over Thirty Minutes 171
Table A109. Evaluation of All Sightings for All Years by Duration of Sighting for Months
of Year, Duration Not Stated . 172
100

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Analysis, from the classic collection. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.